3.7-12V Wireless Remote Control Switch Mini Small PCB 433mhz RF Transmitter,3V -12V Battery Power Circuit Micro Controller for DIY

I was a little worried about whether or not these circuits would work on 3VDC since the title states "3.7 to 12VDC". Connected them to 3VDC (2 AA batteries) and it works flawlessly. I don't need to mess with the different available modes, so I don't know if they work or how hard it is to implement, but the momentary function works perfectly for me.

I purchased two of these to work with 3.7v and 7.4v liPo battery thingies. Only been using it for a few days, but one receiver is switching on at 7.4v and has about 4A running through it -- the power requirements from eight little electric motors, each of which would normally be powered by three AA batteries ...The instructions admittedly were confusing. They are the kind of thing that once you know how the transmitter + receiver works, the instructions then make sense...

Specifically talking about the3.7-12V Wireless Remote Control Switch Mini Small PCB 433mhz RF Transmitter,3V -12V Battery Power Circuit Micro Controller for DIYIt doesn't matter if a product is from another country, the instructions HAVE to be for the ACTUAL product.There is NO "learning button" on this small chip.There are NO buttons at all on the receiver/transmitter.There are NO L.E.D.s on receiver/transmitter.There is NO way to tell if either of the units are doing ANYTHING.IF i need to install my own buttons/L.E.D.'s, THEN that should be part of the instructions.It SEEMS like this small board has pins for a "learning button" and i connected a button to it, but still nothing happens.I'm "pretty good" with electronics and arduino type stuff... and this thing is an absolute joke.I'm returning this for a refund, but honestly, I'm VERY tempted to just send back a random screw. Or bottlecap. Or a picture of Garfield. Because any of those things have about the same functionality as this device.

ive bought quite a few of these for my projects and they work well.

I needed a Transmitter/Receiver to monitor my garage door (Open or closed) (along with Arduino UNO's).. I have tried several NRF24L01 - and could NEVER get any of them to communicate.. As a last resort, tried these.. They worked first time!! (Amazing)..TRANSMITTER: Has 2 wires (POWER ONLY) - switch on power and it transmits, remove power it stops transmitting.RECIEIVER: Has 4 wires (2 for power, 2 for relay switch) Relay is closed when Transmitter is on, open when transmitter is off..Like I said - worked on first try out of the box - VERY HAPPY - PLUS has excellent range!!

Works as advertised. RX draws about 7ma so would last several days on some AA bats. Using to trip a trap when I choose to trip it.

This product is easy to set up and use and it works

Well I am not a happy user at all, since I have gone through two of these kits, and I am done. I am an Electronics Engineer by trade! I installed in a nice small plastic box, and powered the transmitter from the 12volt battery on my garage door opener. The receiver was 10 feet away driving a small Amazon supplied 12volt relay. I use it to light an LED parking light, without running wires across the ceiling. Everything worked great for two months, and then all of a sudden the transmitter board stopped working. Could figure it out, but I could place my thumb and for-finger across the little board and the receiver would light. Took it off and it would quit. Ordered a 2nd one, and just a few days ago the transmitter board stopped again, after working great. This time I used a regulator board from Amazon, and had adjusted the input VCC voltage to 12volts, then 11volts, then 9volts, and this board is dead again! I can do the same with two fingers and the same, remove and it quits! The range on this little board is amazing, when working, in that I can be inside of my 3300 sq' house, and the receiver lights the LED in the garage, thru multiple walls! I am now going to switch to another wireless switch transceiver, to get this resolved!! The board on the right is an Amazon optical sensor relay board to activate the transmitter!